Procedures for Operating in Long Term Evolution Idle Mode

1. A method for applying cell reselection priorities in a wireless transmit/receive unit (WTRU), comprising: receiving a message including first cell reselection priorities and a validity timer associated with the first cell reselection priorities; performing cell reselection using the first cell reselection priorities; starting the validly timer based on the received message; on a condition that the timer expires, discarding the first cell reselection priorities and performing cell reselection using second cell reselection priorities; determining, while the validity timer is valid, whether third cell reselection priorities have been received via dedicated signaling; and on a condition that the third cell reselection priorities have been received, applying the third cell reselection priorities.

2. The method according to claim 1 , wherein the second cell reselection priorities are obtained by reading system information.

3. The method according to claim 1 , wherein the first cell selection priorities are received using dedicated signaling.

4. The method of claim 1 , wherein during cell reselection, on a condition that a detected cell is a closed subscriber group (CSG) cell, camping, by the WTRU, on the detected cell only if a CSG indicator of the cell is on a white list; wherein on a condition that the detected cell is a hybrid CSG cell, camping, by the WTRU, on the cell regardless of whether the CSG indicator of the detected cell is on the white list.

5. A wireless transmit/receive unit (WTRU) comprising: a receiver and a processor configured to receive a message including first cell reselection priorities and a validity timer associated with the first cell reselection priorities; the processor is further configured to perform cell reselection using the first cell reselection priorities; the processor is further configured to start the validity timer in response to the received message; the processor is further configured, on a condition that the timer expires, to discard the first cell reselection priorities and perform cell reselection using second cell reselection priorities; and the processor is further configured, while the validity timer is valid, to determine whether third cell reselection priorities have been received via dedicated signaling, and, on a condition that the third cell reselection priorities have been received, to apply the third cell reselection priorities.

6. The WTRU according to claim 5 , wherein the second cell reselection priorities are obtained from system information.

7. The WTRU according to claim 5 , wherein the first cell selection priorities are received using dedicated signaling.

8. The WTRU of claim 5 , wherein the processor is further configured during cell reselection, on a condition that a detected cell is a closed subscriber group (CSG) cell, to camp on the detected cell only if a CSG indicator of the cell is on a white list; wherein on a condition that the detected cell is a hybrid CSG cell, to camp on the cell regardless of whether the CSG indicator of the detected cell is on the white list.

9. The method according to claim 1 , wherein the message is received by dedicated signaling and includes dedicated cell reselection priorities as the first cell reselection priorities, and the second cell reselection priorities are received in broadcast system information.

10. The method according to claim 9 , wherein the validity timer indicates a length of time the dedicated cell reselection priorities are valid.

11. The WTRU according to claim 5 , wherein the message is received by dedicated signaling and includes dedicated cell reselection priorities as the first cell reselection priorities, and the second cell reselection priorities are received in broadcast system information.

12. The WTRU according to claim 11 , wherein the validity timer indicates a length of time the dedicated cell reselection priorities are valid.